body {
    background-color: #ccc;
}
canvas{
    border: 2px solid #333;
    position: absolute;
    top: 10px;
    right: 100px;
}
button {
    position: absolute;
    left: 80px;
    width: 100px;
    height: 50px;
    border: none;
    font-size: 20px;
    font-weight: bold;
    color: #fff;

}
#easy {
    top: 150px;
    background-color: darkseagreen;
}
#hard {
    top: 250px;
    background-color: hotpink;
}
#end {
    top: 350px;
    background-color: red;
}
div {
    position: absolute;
    left: 60px;
    top: 80px;
    font-size: 20px;
    color: #fff;
}
div input {
    width: 70px;
    height: 20px;
}